cd0d5547e8
Allows for the opening of Virtio-Serial devices on a VM, where a DPDK application can send packets to the host based monitor. The packet formatted is specified in channel_commands.h Each device appears as a serial device in path /dev/virtio-ports/virtio.serial.port.<agent_type>.<lcore_num> where each lcore in a DPDK application has exclusive to a device/channel. Each channel is opened in non-blocking mode, after a successful open a test packet is send to the host to ensure the host side is monitoring. Signed-off-by: Alan Carew <alan.carew@intel.com> Signed-off-by: Pablo de Lara <pablo.de.lara.guarch@intel.com>
90 lines
2.7 KiB
C
90 lines
2.7 KiB
C
/*-
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* BSD LICENSE
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*
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* Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Intel Corporation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _GUEST_CHANNEL_H
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#define _GUEST_CHANNEL_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include <channel_commands.h>
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/**
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* Connect to the Virtio-Serial VM end-point located in path. It is
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* thread safe for unique lcore_ids. This function must be only called once from
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* each lcore.
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*
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* @param path
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* The path to the serial device on the filesystem
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* @param lcore_id
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* lcore_id.
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*
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* @return
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* - 0 on success.
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* - Negative on error.
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*/
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int guest_channel_host_connect(const char *path, unsigned lcore_id);
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/**
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* Disconnect from an already connected Virtio-Serial Endpoint.
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*
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*
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* @param lcore_id
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* lcore_id.
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*
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*/
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void guest_channel_host_disconnect(unsigned lcore_id);
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/**
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* Send a message contained in pkt over the Virtio-Serial to the host endpoint.
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*
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* @param pkt
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* Pointer to a populated struct guest_agent_pkt
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*
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* @param lcore_id
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* lcore_id.
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*
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* @return
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* - 0 on success.
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* - Negative on channel not connected.
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* - errno on write to channel error.
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*/
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int guest_channel_send_msg(struct channel_packet *pkt, unsigned lcore_id);
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#ifdef __cplusplus
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}
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#endif
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#endif
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